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perroud 4e son

4e son

QuestionAnswer
4 règles de la schématisation - Règle et crayon - Titre - Légende - Simple et clair
Onde sonore (définition?) Vibration ayant besoin de matière (Je suis ?)
vitesse du son dans l'air 340 m/s (Vitesse de ?)
Le son est plus rapide (quand ?) Quand les particules sont proches (le son est ?)
Son fort, faible, aigue ou grave (vitesse ?) même vitesse du son (qu'il soit ?)
vitesse de la lumière 300 000 km/s (vitesse de ?)
fréquences audibles de 20 à 20 000 Hertz (Hz) (gamme de ?)
niveau sonore dangereux Au delà de 85 décibel (dB) (niveau ?)
calcul vitesse V = ? d/t (permet de calculer ?)
calcul distance d = ? V x t (permet de calculer ?)
Created by: eraxit
 

 



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